From 69d6f1358ca8c442a65fd8d5900f7296fbb2762d Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 12 Apr 2007 00:36:29 +0000
Subject: [PATCH] improve the patch for PR1318 to also support grouped options
 with custom handlers (like the pass list).  My previous fix only supported
 *new* command line options, not additions to old ones.

This fixes test/Feature/load_module.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35935 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/CommandLine.h |  5 +++++
 lib/Support/CommandLine.cpp        | 19 ++++++++++++-------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/include/llvm/Support/CommandLine.h b/include/llvm/Support/CommandLine.h
index 328aae1c98b..c31d79f4e69 100644
--- a/include/llvm/Support/CommandLine.h
+++ b/include/llvm/Support/CommandLine.h
@@ -57,6 +57,10 @@ void ParseEnvironmentOptions(const char *progName, const char *envvar,
 ///                     CommandLine utilities to print their own version string.
 void SetVersionPrinter(void (*func)());
 
+
+// MarkOptionsChanged - Internal helper function.
+void MarkOptionsChanged();
+
 //===----------------------------------------------------------------------===//
 // Flags permitted to be passed to command line arguments
 //
@@ -469,6 +473,7 @@ public:
     assert(findOption(Name) == Values.size() && "Option already exists!");
     Values.push_back(std::make_pair(Name,
                              std::make_pair(static_cast<DataType>(V),HelpStr)));
+    MarkOptionsChanged();
   }
 
   /// removeLiteralOption - Remove the specified option.
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 3d30e7a9f52..2b0798aa770 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -71,6 +71,13 @@ extrahelp::extrahelp(const char *Help)
   MoreHelp->push_back(Help);
 }
 
+static bool OptionListChanged = false;
+
+// MarkOptionsChanged - Internal helper function.
+void cl::MarkOptionsChanged() {
+  OptionListChanged = true;
+}
+
 /// RegisteredOptionList - This is the list of the command line options that
 /// have statically constructed themselves.
 static Option *RegisteredOptionList = 0;
@@ -80,8 +87,10 @@ void Option::addArgument() {
   
   NextRegistered = RegisteredOptionList;
   RegisteredOptionList = this;
+  MarkOptionsChanged();
 }
 
+
 //===----------------------------------------------------------------------===//
 // Basic, shared command line option processing machinery.
 //
@@ -394,10 +403,6 @@ void cl::ParseCommandLineOptions(int &argc, char **argv,
   // the positional args into the PositionalVals list...
   Option *ActivePositionalArg = 0;
 
-  // Keep track of the option list so far so that we can tell if it is ever
-  // extended.
-  Option *CurOptionList = RegisteredOptionList;
-  
   // Loop over all of the arguments... processing them.
   bool DashDashFound = false;  // Have we read '--'?
   for (int i = 1; i < argc; ++i) {
@@ -405,14 +410,14 @@ void cl::ParseCommandLineOptions(int &argc, char **argv,
     const char *Value = 0;
     const char *ArgName = "";
 
-    // If the head of the option list changed, this means that some command line
+    // If the option list changed, this means that some command line
     // option has just been registered or deregistered.  This can occur in
     // response to things like -load, etc.  If this happens, rescan the options.
-    if (CurOptionList != RegisteredOptionList) {
+    if (OptionListChanged) {
       PositionalOpts.clear();
       Opts.clear();
       GetOptionInfo(PositionalOpts, Opts);
-      CurOptionList = RegisteredOptionList;
+      OptionListChanged = false;
     }
     
     // Check to see if this is a positional argument.  This argument is
-- 
2.34.1